Hey, new to the forum...i have a 99 grand prix gt and just ordered a Reprogrammed PCM from 3800 performance...anyone know anything about these??
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Hey, new to the forum...i have a 99 grand prix gt and just ordered a Reprogrammed PCM from 3800 performance...anyone know anything about these??
I do not, but find a local member with a tuner. That is the best way to tune. By no means can one vendor's tune fit everyone's car.
I started with a ZZP PCM, then got a tuner... so I tune my own now.![]()
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